JP2002303392A - Method of sealing large resin pipe with spiral angle rib - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a sealability at connection positions. SOLUTION: In this method for sealing a large resin pipe 200, the large resin pipes 200 provided by continuously forming angle ribs 202 in spiral shape are butted against each other, and the connection flanges 102 and 103 at both ends of the band 101 are connected to each other to tighten the band 101 so as to connect the joint of the large resin pipes with the band 101. Filler member formed of foam material of rather hard independent or semi-closed cell having a cross sectional area calculated so as to be 0.9 to 2 times the cross sectional area of the valley between the angle ribs is filled into a part of the valley along the valley between the angle ribs located at the position narrower than the effective width of the band. The filling member is fixed to the valley by sticking a temporary fixing foam sheet having an inner surface coated with glue so as to cover the filling member. The foam sheet coated with glue on the inner surface thereof is wound on the connection positions of the resin pipe so that the filling members of both resin pipes fixed to the valley are covered with the temporary fixing foam sheet, and the resin pipes are band- connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing a large resin pipe having a spiral angled rib.

[0002]

2. Description of the Related Art Resin pipes having spiral chevron ribs are widely used for civil engineering drainage pipes in construction sites such as golf courses because of their light weight and easy construction. To butt and join the resin pipes having such spiral chevron ribs,
The valley 201 between the chevron ribs 202 of the resin tube 200 as shown in FIG. 12 is filled with a rod-like body of rectangular cross section of soft urethane foam or rubber (that is, a filling member) of trapezoidal cross section, and its periphery is covered with putty. In this way, part of the valley 201 is filled,
After overflowing from the chevron rib 202, the sheet is covered with a polyethylene foam sheet (sealant 104) and wrapped, and this portion is fastened with a joining band. As shown in FIGS. 13 and 14, the bonding band 100 is a band 101 wound on a chevron rib 202 of a resin tube 200.
And joining flanges 1 provided at both ends of the band 101
02, 103, and the end of the band 101 provided with one joining flange 102 is connected to the other joining flange 103.
Is inserted under the end band 101A provided with the. The end band 101A is fixed to one end of the band 101. As this bonding band 100,
It is made of resin or metal, and has a protruding portion that protrudes into a valley inside to prevent the joining band 100 from shifting in the axial direction. The band 101 of the bonding band 100 tightens a sealing member 104 made of a sheet of polyethylene foam on the chevron rib 202. Joining flange 102,
103 is fastened with a bolt 105 and a nut 106.

[0003]

The above-mentioned sealing material 104
Almost no sealability can be expected. This is because the use of a polyethylene foam sheet and the selection of a filling member that can seal the gap between the valleys are problematic. Polyethylene foam is the cheapest and water-resistant material among foam materials. However, since the surface is hard, it is most unsuitable for a sealing material used for wrapping. Therefore, in order to ensure the sealing performance of the resin pipe joint, a filling member made of a slightly harder foam material 1A of closed cells or semi-closed cells along the valley 201 between the angled ribs 202 located at a position narrower than the effective width of the band. 1 and the filling member 1 in which the caulking material or the sealing material is coated on the periphery of the foam material 1 </ b> A, the cross-sectional area of the filling member 1 is smaller than the cross-sectional area of the valley 201 between the chevron ribs 202 by 0.1.
Calculate to be 9 to 2 times, fill a part of the valley, and wrap and wrap a foam sheet 2 that has been glued 2A on its inner surface so as to cover the filling member 1 and then wrap the helical chevron ribs that join the band. A method of sealing resin pipes has been developed. However, although this sealing method is effective for small resin pipes having a diameter of 100 to 300 mm, it has been found that when applied to large resin pipes having a large diameter of 600 mm or more, workability during construction is poor. For example, when handling a large-diameter resin pipe having a diameter of 600 mm or more, the position where the filling member 1 is arranged is not at the top of the resin pipe,
The filling member 1 filled in the valley 201 before the foam sheet 2 is wound around,
Had dropped out. In other words, in order to wind the foam sheet 2 around the joints of the resin pipes or to perform band joining, the large resin pipes are placed (separated from the ground) so as to float about 200 to 300 mm from the ground and work. When handling, the height of the top of the large resin pipe is further increased by 200 to 300 mm from the diameter of the resin pipe, and if the filling member 1 is to be filled at a position below the line of sight of the worker so that the work can be easily performed, Filling member 1 in valley 201 at an oblique position
And the filling member 1 was dropped from the valley 201 before the foam sheet 2 was wound.
Filling member 1 coated with caulking material or sealing material
In the case where is used, it is possible to ensure excellent sealing properties at the joining portion, but the caulking material or the sealing material does not have an immediate effect of bonding the valley 201 and the filling member 1, and the filling member 1 Was more likely to fall off. Further, since the foam sheet 2 to be wound around the large resin pipe is large and long, it is difficult to handle the foam sheet 2. 2 are entangled and the glue-processed 2A surface is stained.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sealing method which improves the sealing performance of a joint in a large-sized resin pipe and improves workability at the time of operation.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a band formed by abutting large resin pipes having helical ridges formed continuously in a spiral shape, and joining the joints thereof by joining joining flanges at both ends. In a method of sealing a large resin pipe in which a band is joined by tightening, a closed member or a semi-closed cell, which is a slightly harder foam material, is cut along a valley between chevron ribs located at a position narrower than the effective width of the band. Filling a part of the valley by calculating the area to be 0.9 to 2 times the cross-sectional area of the valley between the chevron ribs, forming a temporary fixing foam sheet on the inner surface so as to cover this filling member After affixing the filling member in the valley by attaching, the foam sheet, whose inner surface is glued, is joined to the resin pipe so as to cover the respective filling members of the two resin pipes fixed in the valley with the temporary fixing foam sheet. It is intended to band junction after wrapping wound in place.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

The resin tube 200 applied in this embodiment is
It is a large-sized polyethylene resin tube having a diameter of 600 mm or more. FIG. 1 shows an enlarged cross section of a joining portion of the resin tubes 200R and 200L, and shows an effective width of the band 101 (FIG. 11).
Along the valley 201 at a narrower position, the filling member 1 made of a slightly harder foam material 1A has a cross-sectional area of 0.9 to 2 times the cross-sectional area of the valley 201, preferably 1.1 to 1.. It is calculated so as to be five times and is filled in a part of the valley 201. The filling member 1 has an inverted trapezoidal cross section, and uses a slightly hard foam material 1A extruded with closed cells or semi-closed cells. Then, in order to prevent the filling member 1 from dropping out of the valley 201, a temporary fixing foam sheet 21, which has been glued 21 A, is attached to the inner surface so as to cover the filling member 1, and the filling member 1 is fixed to the valley 201. A foam sheet 2 having a glue-processed inner surface 2A is wound around a joining portion of a resin tube in which two resin tubes 200R and 200L are attached to each other, and a band is further joined from above. In this embodiment, the valley 201 filled with the filling member 1 is used as the temporary fixing foam sheet 21 for preventing the filling member 1 from falling off from the valley 201 (for fixing the filling member 1 to the valley 201). Of the chevron ribs protruding on both sides of the valley 201 is applied from one top to the other, and has a sheet width capable of covering the filling member 1 filled in the valley 201.

That is, in the embodiment shown in FIG. 1, the work of preventing the filling member 1 from falling off (fixing the filling member 1 to the valley 201) by the temporary fixing foam sheet 21 is separately performed for each resin pipe. That is, the valley 201 of the one resin tube 200R.
The filling member 1 is fixed to the valley 201 with the temporary fixing foam sheet 21 to prevent the filling member 1 from falling off, and the filling member 1 is filled in the valley 201 of the other resin pipe 200L. And the filling member 1 is fixed to the valley 201 by the temporary fixing foam sheet 21,
The operation for preventing the filling member 1 from falling off is performed separately. Each of the resin pipes 200R and 20 having been subjected to the work of preventing the filling member 1 from falling off by the temporary fixing foam sheet 21
0L is butt-bonded, and a foam sheet 2 having an inner surface subjected to glue processing 2A is wound around a joining portion of the resin pipe and wrapped, and then band-joined from above. The foam sheet 2 wound around the joint of the resin pipes covers the filling member 1 fixed to the valley 201 of each of the resin pipes 200R and 200L. One having a sheet width is used.

A temporary fixing foam sheet 2 covering a filling member 1
1 and foam sheet 2 have a density of 0.04 to 0.3, preferably 0.08 to 0.3 and a JIS C hardness of 5
It is a closed-cell foam material that satisfies the condition of 100 to 1000 gf / cm ² in 50% compression hardness according to JIS K6767, and EPDM foam is more preferable than polyethylene or polypropylene foam material. In addition, the number of cells of an EPDM foam closed cell type is 30 to
100 having a density of 0.1 has a large water stopping effect because the deformation due to the tightening force at the time of band joining is large.

In particular, in the case of the foam sheet 2, when the density of the foam material of the EPDM foam having closed cells is around 0.1, the degree of deformation due to the tightening force is large. Demonstrates excellent sealing performance. Although the tightening force of the bonding band 100 has an effect in terms of the bonding strength, there is also a portion where an effective force is not transmitted as a seal. Rather, the bonding band 100 is more effective in protecting the bonding portion. Sealing performance is EP
DM foam (form sheet 2) is mainly responsible. E
The wrapped portion of the PDM foam, even when wrapped, conforms better to its low resilience and enhances the sealing effect. As the glue processing 2A on the inner surface of the foam sheet 2, it is preferable to use a butyl rubber-based adhesive or an acrylic adhesive. Butyl rubber-based and acrylic rubber pastes are excellent in adhesion to an object to be bonded. In addition, since the reinforcing material is removed from the rubber paste 2A of the foam sheet 2, there is no possibility that the foam sheet 2 is broken by an axial force at the time of load.

In the embodiment shown in FIG. 2, the work of preventing the filling member 1 from falling off (fixing the filling member 1 to the valley 201) by the temporary fixing foam sheet 21 is performed over both resin pipes. In this embodiment, the same effect as in the previous embodiment can be obtained. In this embodiment, an operation for preventing the filling member 1 filled in the valley 201 of the one resin tube 200R from falling off and an operation for preventing the filling member 1 filled in the valley 201 of the other resin tube 200L from falling off. However, it is constructed continuously by the temporary fixing foam sheet 21 'straddling both resin pipes. That is, the two resin tubes 200R and 20R
The filling member 1 filled in the valley 201 of 0 L is simultaneously fixed with the temporary fixing foam sheet 21 ′, and the temporary fixing foam sheet 21 ′ includes two resin pipes 200 R.
Valley 20 filled with the filling member 1 of one of the resin pipes 200R at the joining place where
1 and the valley 201 where the filling member 1 of the other resin tube 200L is filled.
Are continuously applied over the tops of two chevron ribs protruding on both sides of the rib. In this embodiment, a temporary fixing foam sheet 21 'having a sheet width equivalent to that of the foam sheet 2 for winding the joint portion of the resin pipe is used.

That is, in this embodiment, one resin tube 20 is used.
The filling member 1 is filled in the valley 201 of 0R, and the filling member 1 is also filled in the valley 201 of the other resin tube 200L.
Form sheet 21 for temporary fixing over R and 200L
', The filling member 1 filling the valley 201 of one resin tube 200R and the other resin tube 20
The filling member 1 to be filled in the valley 201 of 0 L is fixed at the same time. After performing the work of preventing the filling member 1 from falling off by the temporary fixing foam sheet 21 ′, the foam sheet 2 on which the inner surface is glued 2A is removed. It is wrapped around a joint of a resin tube, wrapped, and band-joined from above.

The filling member 1 in each of the embodiments shown in FIGS. 1 and 2 has a trapezoidal cross section, uses a slightly harder foam material 1A, and has a trapezoidal shape matching the shape of the valley 201. The deformation rate due to the compressive force due to joining is small,
This is because a material having a large specific gravity can be used. In other words, in order to obtain a sufficient compression ratio, if the deformation rate of the filling member 1 is large, the large filling member 1 is necessary, and if the large filling member 1 is arranged at an oblique position of the large resin pipe, the filling member 1 Is used, so that the filling member 1 having a trapezoidal cross section with a small deformation rate is used.

The embodiment shown in FIG.
02 has a greatly curved shoulder (resin diameter 60)
(0 mm or more). In the case of a resin pipe in which the shoulder of the angled rib 202 is greatly curved as in this embodiment, the filling member 1 for filling the valley 201 is used.
It is preferable to use a shape that is formed in accordance with the cross-sectional shape of the valley 201 (the curve of the shoulder of the chevron rib 202) and that has a shape in which the center of the upper surface is raised.
The shape of the filling member 1 conforming to the curve of the chevron rib and the swelling at the center of the upper surface are for giving a compressibility by the filling member 1 when tightened by band joining. In this embodiment, after the work for preventing the filling member 1 from falling off is performed by the temporary fixing foam sheet 21, the joining portion of the resin pipe is wound around the foam sheet 2 and further band-joined, which is the same as the previous embodiment. The effect of is obtained. Particularly, in a resin pipe in which the shoulder 201 of the angled rib 202 curves greatly and the volume of the valley 201 is formed large, the valley 20
Since the filling member 1 filled in 1 is likely to fall off, the valley 20
The filling member 1 filled in 1 is temporarily attached to the foam sheet 21.
As a result, the workability at the site is improved. In this embodiment, the work of preventing the filling member 1 from falling off by the temporary fixing foam sheet 21 is separately performed for each resin pipe. However, as in the embodiment shown in FIG.
The temporary fixing foam sheet 21 'is continuously applied over both resin pipes, and the filling members 1 of the two resin pipes are fixed at the same time, and the work of preventing the filling members 1 from falling off is continuously performed on both resin pipes. You may do so.

In the embodiment shown in FIG.
B and a foam material 1C provided therearound are shown. The core 1B used a hard foam material or solid rubber material, and the foam material 1C used was softer than the foam material 1A shown in FIGS. This filling member 1 has a sectional area of 0.9 to 0.9 from the sectional area of the valley 201.
A part of the valley 201 is filled by calculating so as to be twice, preferably 1.1 to 1.5 times. Core 1B of filling member 1
When using a hard foam material, the density is 0.1 to
0.4, a JIS C hardness of 5 to 40, or a 50% compression hardness of 100 to 100 in JIS K6767.
Use closed-cell or semi-closed cells satisfying the performance of 1000 gf / cm ² . The foam material 1C around the core 1B has a density in the range of 0.04 to 0.3, preferably in the range of 0.04 to 0.2, and has a JIS C hardness of 5 to 30, or JIS K6767. A closed-cell or semi-closed-cell foam having a 50% compression hardness of 100 to 1000 gf / cm ² is used.

Materials used for the foam materials 1A and 1C and the core 1B include CR (chloroprene rubber), NBR / PV
C (blend type rubber obtained by mixing partially crosslinked nitrile rubber with vinyl chloride resin), IIR (butyl rubber), EPDM (ethylene propylene rubber), NR (natural rubber), NR / SB (natural rubber / styrene butadiene rubber) ), Foamed rubber or PVC foam, styrene-based, urethane-based, olefin-based elastomers and the like can be used.

Each of the embodiments shown in FIG. 5 to FIG.
FIG. 7 shows an example in which the foam material 1C is not formed entirely around the core 1B, and the upper surface of the core 1B is not covered with the foam material 1C in FIG. In the filling member having the shape shown in FIG.
Use a foam material 1C around the low-density material that is easily compressed and deformed at a low density.

The filling member 1 has a cross-sectional shape of a valley 20.
A high-density material can be used when it substantially matches the cross-sectional shape of No. 1, but a low-density material having a rectangular cross-section is preferably used. The filling member 1 shown in FIGS.
Can be formed by extrusion.

In the embodiment shown in FIGS. 1 to 7,
By using the filling member 1 in which a urethane-based or silicone-based caulking material is formed around the foam materials 1A and 1C, excellent sealing performance by the filling member 1 can be ensured.

In the embodiment shown in FIGS. 4 to 7, the temporary fixing foam sheet 21 for fixing the filling member 1 in the valley 201 is composed of one resin pipe 200R and the other resin pipe 20.
2L and 0L separately.
As shown in the embodiment shown in FIG. 1, the temporary fixing foam sheet 21 may be continuously applied over both the resin pipes 200R and 200L to be joined, and then the foam sheet 2 may be applied.

As described above, the filling member 1 is moved to the valley 201.
After the filling, the temporary fixing foam sheet 21 is attached so as to cover the filling member 1 and the filling member 1 is fixed to the valley 201. In addition, there is no possibility that the filling member 1 falls off from the valley 201.

FIGS. 8 to 10 show that the filling member 1 filled in the valley 201 is fixed by the temporary fixing foam sheet 21 to prevent the filling member 1 from dropping from the valley 201, and then the foam sheet 2 (single sheet) is formed. ) Or a short form sheet 22 (plurality) in which the foam sheet is made into a short form, and a resin tube joining portion is wound and band-joined from above, and a cross-sectional view of the resin tube joining portion is shown. In this embodiment, the band 101 and the joining flange 102,
The band is joined with a joining band composed of a resin tube 103. By joining the joining flanges 102 and 103 with bolts and nuts, the joining portion of the resin pipe is fastened and band joined.

FIG. 8 shows a state in which the foam sheet 2 is wrapped around the joint of the resin pipe in a single turn.
An embodiment is shown in which band-joining portions (joining flanges 102 and 103) are arranged on the upper portion where wrapping is performed. That is, the joining flanges 102 and 103 are arranged on the area where the foam sheet 2 overlaps.
In this embodiment, the resin pipes are joined by a belt-type band joining having a single joining point (joining flange 102, 103) of the joining band. The valley 20 of each resin pipe is formed by the temporary fixing foam sheet 21 having the inner surface glued 21A.
After the work for preventing the filling member 1 filled in 1 from falling off,
The joining portion of the resin pipe is wound by one roll with the two foam sheets 2. At this time, the temporary fixing form sheet 21
The surface of the glue processing 2A of the foam sheet 2 is adhered so as to cover the filling member 1 of both resin tubes fixed by the above, and the foam sheet 2 wound around the resin tube 200 is overlapped while lightly applying tension, and then overlapped. The band joining points (joining flanges 102, 1)
03) is arranged.

If the joining points (joining flanges) 102 and 103 for band joining cannot be arranged on the area where the foam sheet 2 wound around the resin pipe 200 overlaps, the foam sheet 2 in the area where the joining flange is arranged is used. A new short-form foam sheet (short-form foam sheet) 22 is attached to the upper part of
And As the short foam sheet 22 to be stuck to the area where the joining flange is arranged, a piece having a size larger than the joining gap X between the joining flanges 102 and 103 is used (see FIG. 10).

As shown in the embodiment of FIG.
Over the overlapped area of the joint flange 102,
103 may be arranged, but a short foam sheet 22 is newly attached and the joining flanges 102, 1 are attached.
By arranging 03, the joining flange can be installed at an arbitrary place, and for example, the joining flanges 102 and 103 of each joining band by the continuous resin pipe can be aligned and constructed. In other words, since a joining band is applied to the joining portion of the resin pipe, a plurality of joining bands are provided in a continuous resin pipe in which a plurality of resin pipes are connected in series, and at this time, the joining band of each joining band is provided. The positions of the flanges can be easily aligned.

In the embodiment shown in FIG. 9 as well, the foam sheet 2 is wrapped around the joint of the resin pipe in a single turn, and the joints (joining flanges 102B, 103B) for band joining are arranged above the wrapping of the foam sheet 2. In this embodiment, the resin pipes are joined by split band joining having a plurality of joining flanges. That is, the band is joined by a joining band formed by the two divided bands 101, and two pairs of joining flanges 102 are provided.
A and 103A, 102B and 103B, one of the joining flanges 102A and 103A is joined without any gap, and the other is joined by the other joining flanges 102B and 103B. In a region where one of the joining flanges 102A and 103A is disposed, a short-form foam sheet 22 is newly attached to the upper portion of the foam sheet 2 to form a multilayer (overlap). The other joining flanges 102B and 103B are arranged on the area where the foam sheet 2 wound around the sheet overlaps.

In the embodiment shown in FIG. 10, a plurality of short foam sheets 22 are used, and while the short foam sheets 22 are overlapped with each other, the joining portion of the resin pipe is wound. Foam sheet 2 with glue inside
The larger (longer) is, the more difficult it is to handle, the more easily the glued surface is contaminated at the time of construction. However, using a plurality of short foam sheets 22 with the inner surface glued 22A, the end of each short foam sheet 22 By winding the joint portion of the resin tube while wrapping, handling is easy and workability can be improved. When a plurality of the short foam sheets 22 are used to wind the joint portion of the resin pipe, the ends of the short foam sheets 22 are each 50 mm.
By winding and lapping a large resin tube with the above overlap, the adhesion by the glue processing 22A is ensured.

When the resin tube 200 is wound using the short foam sheet 22, the short foam sheet wound around the resin tube is wrapped by wrapping the resin tube 200 while overlapping the short foam sheet 22 while slightly applying tension. A joining point (joining flange) for band joining is arranged on the area where 22 overlaps. If the joining flange cannot be arranged in the overlapping area of the short foam sheet wound around the large resin pipe, a new short foam sheet is newly placed on the short foam sheet 22 in the area where the joining flange is arranged. 22 is attached to form a multilayer (overlap). Also in this embodiment, the resin pipes may be joined by split band joining having a plurality of joining flanges.

As the short foam sheet around which the joining portion of the resin tube is wound, a short sheet formed of the foam sheet 2 and having an arbitrary length is used. Accordingly, when the temporary fixing foam sheet 21 for preventing the filling member 1 filled in the valley 201 from falling off is formed of the same foam material as the short foam sheet 22, the short foam formed to an arbitrary length is used. The sheet 22 can be used as the temporary fixing foam sheet 21. That is, the short foam sheet 22 slightly larger than the filling member 1 can be used as the temporary fixing foam sheet 21. By substituting the short form sheet 22 as the temporary fixing form sheet in this manner, the number of components to be prepared can be reduced. That is, since the work for preventing the filling member 1 from dropping can be performed by substituting the short foam sheet 22, it is not necessary to prepare the temporary fixing foam sheet 21. When the short foam sheet 22 is used as the temporary fixing foam sheet 21, the work of preventing the filling member 1 from falling off is performed continuously over both resin pipes to be joined.

[0030]

As described above, according to the present invention, the rubber around the slightly hard foam material of closed cells or semi-closed cells along the valley between the chevron ribs located at a position narrower than the effective width of the band. The filling member formed with the paste is calculated so that the cross-sectional area thereof is 0.9 to 2 times, preferably 1.1 to 1.5 times the cross-sectional area of the valley between the chevron ribs, and is filled in a part of the valley. Then, after the filling member is securely fixed in the valley by the temporary fixing foam sheet, a foam sheet processed by gluing on the inner surface to cover this filling member is wrapped and wrapped,
After that, the band is joined, so that the filling member filled in the valley is moderately deformed by the compressive force due to the band joining, and can be brought into close contact with the joint to exhibit sealing performance. In addition, after filling the filling material between the valleys, by pasting the glue-processed temporary fixing foam sheet on the inner surface and fixing the filling material between the valleys, filling before filling the foam sheet around the joint of the resin pipe The member can be prevented from falling off from the valley. In addition, since the inner surface of the foam sheet around which the resin tube is to be joined is coated with glue, the filling member can be wound so as to be in close contact with the inside of the valley. However, sufficient sealing performance can be obtained.

Further, when wrapping a large resin pipe with a foam sheet, a plurality of short foam sheets which are easy to handle are used, and the joining portion of the large resin pipe is wound while overlapping the ends of each short foam sheet. By wrapping, there is no danger of the foam sheet being entangled or the glue-processed surface becoming dirty when the foamed sheet whose inner surface is glued is wound around a large resin tube.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment.

FIG. 3 is a sectional view showing still another embodiment.

FIG. 4 is a sectional view showing an embodiment in which a core is provided in a filling member.

FIG. 5 is a sectional view 1 showing a modification of the filling member of FIG. 4;

FIG. 6 is a sectional view 2 showing a modification of the filling member of FIG. 4;

FIG. 7 is a sectional view 3 showing a modification of the filling member of FIG. 4;

FIG. 8 is a cross-sectional view illustrating an example in which a joining portion of a resin pipe is wound around a foam sheet and band-joined from above.

FIG. 9 is a sectional view showing another embodiment of the example shown in FIG. 8;

FIG. 10 is a sectional view showing still another embodiment of the example shown in FIG. 8;

FIG. 11 is a schematic perspective view of a joint.

FIG. 12 is a schematic diagram showing a chevron rib and a valley of a resin pipe.

FIG. 13 is a front view showing a conventional example.

FIG. 14 is an enlarged cross-sectional view of a joint flange portion of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filling member 1A, 1C Foam material 1B Core 2 Foam sheet 2A Glue processing 21 Temporary form sheet 21A Glue processing 22 Short form sheet 22A Glue processing 100 Joining band 101 Band 102,103 Joining flange 200 Resin pipe 201 Valley 202 Angle rib

Continued on the front page F term (reference) 3H019 GA08 4F211 AG08 TA04 TA06 TC11 TD07 TN43 TN58 TN72

Claims (12)

[Claims] 1. A method for sealing a large resin pipe, in which a large resin pipe having a chevron-shaped rib formed continuously in a spiral shape is abutted, and a joint thereof is joined by joining the joining flanges at both ends to fasten the band to join the band. A filling member made of a slightly harder foam material of closed cells or semi-closed cells is provided along the valley between the chevron ribs located at a position smaller than the effective width, and the cross-sectional area of the filling member is 0.9 to 2 larger than the cross-sectional area of the valley between the chevron ribs. After filling to a part of the valley by calculating so as to be doubled, a temporary fixing foam sheet that has been glued on the inner surface is attached to cover this filling member and the filling member is fixed in the valley, and then the temporary fixing foam Wrap a foam sheet, which has been glued on its inner surface, around the joining point of the resin pipe so as to cover the respective filling members of both resin pipes fixed in the valleys by the sheet, and then perform band joining after wrapping. Sealing method of a large resin tube having a helical chevron rib to symptoms. 2. A method for sealing a resin pipe in which a resin pipe formed by continuously forming a helical ridge in a spiral shape is joined to each other, and a joint thereof is joined by joining the joining flanges at both ends to tighten the band. A filling member having a core of a hard foam material or a solid rubber material along a valley between the chevron ribs at a narrower position and a soft foam material provided around the core is used to cut a cross section of the valley between the chevron ribs. 0.9 ~
Calculate to be doubled, fill part of the valley, paste a temporary fixing foam sheet on the inner surface to cover this filling member, fix the filling member in the valley, Spiral characterized by wrapping and wrapping a foam sheet that has been glued to the inner surface around a joining point of a large resin pipe so as to cover the respective filling members of both resin pipes fixed in the valleys by the foam sheet, and then band-joining. Sealing method for large resin pipes with chevron shaped ribs. 3. The core of the filling member has a density of 0.1 to 0.1.
0.4, a JIS C hardness of 5 to 40, or a 50% compression hardness of 100 to 100 in JIS K6767.
The method for sealing a large-sized resin tube having a helical chevron rib according to claim 2, wherein a closed-cell or semi-closed-cell foam material satisfying the performance of 1000 gf / cm ² is used. 4. A foam material around a core of a filling member having a density within a range of 0.04 to 0.3 and JIS
C hardness 5 to 30, or 50 in JIS K6767
The seal for a large-sized resin pipe having a helical chevron rib according to claim 2 or 3, wherein a closed-cell or semi-closed-cell foam material satisfying the performance of% compression hardness of 100 to 1000 gf / cm ² is used. Method. 5. The method according to claim 1, further comprising: wrapping a joining portion of the resin tube with a foam sheet, and then arranging a joining portion of a band joint above an area where the foam sheet overlaps. A method for sealing a large-sized resin pipe having a spiral chevron rib according to claim 1. 6. After a joining portion of a large-sized resin pipe is wound with a foam sheet, a short-form foam sheet larger than a joining gap of the band joining is newly provided on an upper portion of the foam sheet in a region where the joining portion of the band joining is arranged. The band is joined after pasting, and the band is joined.
A method for sealing a large-sized resin pipe having a helical chevron-shaped rib according to the above item. 7. A method of using a plurality of short foam sheets each having a short foam sheet, winding a joining portion of a resin pipe while overlapping an end portion of each short foam sheet, and sealing the joining portion of the resin tube. A method for sealing a large-sized resin pipe having a spiral-shaped angled rib according to any one of claims 1 to 6, characterized in that: 8. A foam sheet for temporary fixing and a foam sheet having a density of 0.04 to 0.3 and JIS C
Hardness 5 to 30, or 50% in JIS K6767
The method for sealing a large-sized resin pipe having a helical angled rib according to any one of claims 1 to 7, wherein a foam material satisfying a performance of a compression hardness of 100 to 1000 gf / cm ² is used. 9. The method for sealing a large-sized resin tube having a helical angled rib according to claim 1, wherein a large-sized resin tube having a diameter of 600 mm or more is joined. 10. When joining a filling member in a valley by attaching a temporary fixing foam sheet,
The method for sealing a large-sized resin pipe having a helical chevron-shaped rib according to any one of claims 1 to 9, wherein the temporary fixing foam sheets are separately applied to the two large-sized resin pipes. 11. A bonding method when a filling member is fixed in a valley by attaching a temporary fixing foam sheet.
The method for sealing a large-sized resin pipe having a helical chevron-shaped rib according to any one of claims 1 to 9, wherein a temporary fixing foam sheet is continuously applied to two large-sized resin pipes. 12. A method for wrapping a joint portion of a large-sized resin pipe by using short foam sheets formed to have various lengths, and using a part of the short foam sheets of various sizes as a temporary fixing foam sheet, A short foam sheet for fixing a filling member filled in a valley of two resin tubes at the same time to prevent the filling member from dropping out of the valley, and having a length slightly larger than a length of the filling member. The helical chevron rib according to claim 11, wherein, after the filling members of both the resin tubes are continuously fixed by the method, the joining points of the resin tubes are wound and sealed while overlapping a plurality of short foam sheets. A method for sealing large resin tubes.